553
FNCA52 TJSJ 300749 CCA
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
349 AM AST THU JUL 30 2026
DISCUSSION
DRIER CONDITIONS ARE EXPECTED TO RETURN TODAY; HOWEVER, AVAILABLE
LOW-LEVEL MOISTURE SHOULD KEEP MINIMUM RELATIVE HUMIDITY VALUES
NEAR OR ABOVE CRITICAL THRESHOLDS. DESPITE THIS, CRITICALLY DRY
FUELS WILL PERSIST ACROSS SOUTHERN PUERTO RICO AND ST. CROIX, WITH
KEETCH-BYRAM DROUGHT INDEX (KBDI) VALUES REMAINING ABOVE CRITICAL
LEVELS. EASTERLY WINDS ARE ALSO EXPECTED TO STRENGTHEN OVER THE
NEXT COUPLE OF DAYS, WHICH COULD PROMOTE THE RAPID SPREAD OF ANY
FIRE THAT DEVELOPS. RESIDENTS AND VISITORS SHOULD AVOID OUTDOOR
BURNING AND EXERCISE CAUTION WITH ACTIVITIES THAT COULD GENERATE
SPARKS OR OPEN FLAMES, ESPECIALLY ACROSS AREAS WITH CRITICALLY DRY
VEGETATION.
PRZ014-302000-
SOUTHEAST COASTAL PLAINS-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 0 20
TEMP (24H TREND) 93 (+3) 75 (-2) 91
RH % (24H TREND) 50 (-15) 89 (+1) 53
WIND 20FT/EARLY(MPH) E 18 E 14 E 16
WIND 20FT/LATE(MPH) E 18 NE 12 E 19
MIXING HGT(FT-AGL/MSL)5450 5770
TRANSPORT WND (MPH) E 23 E 18
VENT RATE (KT-FT) 109000 92320
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-302000-
SOUTHERN HILLS-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 0 40
TEMP (24H TREND) 90 (+4) 71 (-3) 89
RH % (24H TREND) 56 (-14) 96 (+3) 59
WIND 20FT/EARLY(MPH) E 14 E 13 E 14
WIND 20FT/LATE(MPH) E 14 E 13 E 14
MIXING HGT(FT-AGL/MSL)5730 6410
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 108870 96150
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-302000-
NORTH COASTAL PLAINS-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 30 40
TEMP (24H TREND) 92 (+2) 75 (-2) 90
RH % (24H TREND) 58 (-9) 97 (+4) 61
WIND 20FT/EARLY(MPH) E 16 E 20 E 17
WIND 20FT/LATE(MPH) E 21 E 12 E 23
MIXING HGT(FT-AGL/MSL)5760 5720
TRANSPORT WND (MPH) E 22 E 20
VENT RATE (KT-FT) 109440 97240
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-302000-
NORTHERN HILLS-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 10 50
TEMP (24H TREND) 91 (+2) 72 (-2) 89
RH % (24H TREND) 58 (-10) 99 (+1) 65
WIND 20FT/EARLY(MPH) E 14 E 19 E 14
WIND 20FT/LATE(MPH) E 20 E 10 E 19
MIXING HGT(FT-AGL/MSL)6700 6250
TRANSPORT WND (MPH) E 20 E 16
VENT RATE (KT-FT) 113900 87500
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-302000-
WEST COAST-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR PCLDY
PRECIP TYPE SHOWERS NONE TSTMS
CHANCE PRECIP (%) 30 0 60
TEMP (24H TREND) 94 (+2) 73 (-2) 92
RH % (24H TREND) 57 (-9) 98 (+2) 61
WIND 20FT/EARLY(MPH) E 17 E 17 E 13
WIND 20FT/LATE(MPH) E 17 E 12 E 14
MIXING HGT(FT-AGL/MSL)5530 5150
TRANSPORT WND (MPH) E 18 E 10
VENT RATE (KT-FT) 88480 46350
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-302000-
EASTERN INTERIOR-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 30 50
TEMP (24H TREND) 91 (+3) 72 (-4) 89
RH % (24H TREND) 57 (-11) 98 (+6) 60
WIND 20FT/EARLY(MPH) E 17 E 13 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 14
MIXING HGT(FT-AGL/MSL)6140 6900
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 116660 103500
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-302000-
LUQUILLO MOUNTAIN RANGE-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 30 50
TEMP (24H TREND) 86 (+4) 70 (-4) 84
RH % (24H TREND) 65 (-12) 100 (+5) 67
WIND 20FT/EARLY(MPH) E 14 E 11 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 13
MIXING HGT(FT-AGL/MSL)5400 5300
TRANSPORT WND (MPH) E 23 E 18
VENT RATE (KT-FT) 108000 84800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-302000-
CENTRAL MOUNTAIN RANGE-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE TSTMS
CHANCE PRECIP (%) 30 0 60
TEMP (24H TREND) 89 (+6) 69 (-2) 86
RH % (24H TREND) 61 (-14) 100 (+2) 68
WIND 20FT/EARLY(MPH) E 12 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 8 E 11
MIXING HGT(FT-AGL/MSL)7550 7100
TRANSPORT WND (MPH) E 17 E 14
VENT RATE (KT-FT) 113250 85200
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-302000-
CAYEY MOUNTAIN RANGE-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 86 (+4) 70 (-4) 85
RH % (24H TREND) 64 (-12) 99 (+4) 67
WIND 20FT/EARLY(MPH) E 12 E 12 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 12
MIXING HGT(FT-AGL/MSL)5700 5760
TRANSPORT WND (MPH) E 23 E 18
VENT RATE (KT-FT) 114000 92160
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-302000-
VIEQUES-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 30
TEMP (24H TREND) 91 (+1) 79 (-2) 90
RH % (24H TREND) 56 (-6) 86 (+4) 55
WIND 20FT/EARLY(MPH) E 19 E 18 E 17
WIND 20FT/LATE(MPH) E 16 E 18 E 17
MIXING HGT(FT-AGL/MSL)3840 3930
TRANSPORT WND (MPH) E 26 E 22
VENT RATE (KT-FT) 88320 74670
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-302000-
CULEBRA-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 40
TEMP (24H TREND) 91 (+2) 78 (-3) 91
RH % (24H TREND) 58 (-10) 87 (+4) 58
WIND 20FT/EARLY(MPH) E 19 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)3580 3850
TRANSPORT WND (MPH) E 28 E 22
VENT RATE (KT-FT) 85920 73150
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-302000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 0 30
TEMP (24H TREND) 94 (+3) 74 (-3) 92
RH % (24H TREND) 52 (-11) 93 (+5) 55
WIND 20FT/EARLY(MPH) E 23 E 23 E 19
WIND 20FT/LATE(MPH) SE 23 E 14 SE 20
MIXING HGT(FT-AGL/MSL)5280 5620
TRANSPORT WND (MPH) E 25 E 17
VENT RATE (KT-FT) 116160 84300
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-302000-
SAINT THOMAS AND SAINT JOHN-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS SHOWERS
CHANCE PRECIP (%) 0 10 30
TEMP (24H TREND) 89 (+2) 77 (-4) 89
RH % (24H TREND) 59 (-8) 88 (+4) 60
WIND 20FT/EARLY(MPH) E 19 E 18 E 18
WIND 20FT/LATE(MPH) E 18 E 18 E 18
MIXING HGT(FT-AGL/MSL)3470 3690
TRANSPORT WND (MPH) E 23 E 23
VENT RATE (KT-FT) 69400 73800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-302000-
ST CROIX-
349 AM AST THU JUL 30 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 30
TEMP (24H TREND) 90 (+2) 78 (-2) 90
RH % (24H TREND) 61 (-6) 90 (+4) 61
WIND 20FT/EARLY(MPH) E 18 E 17 E 17
WIND 20FT/LATE(MPH) E 17 E 17 E 16
MIXING HGT(FT-AGL/MSL)5320 4910
TRANSPORT WND (MPH) E 25 E 22
VENT RATE (KT-FT) 117040 93290
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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